Fosi Audio MC331 Tube Integrated Amplifier with DAC Bluetooth VU Meter

Overview

The Fosi Audio MC331 is a stereo power amplifier designed for desktop, apartment, and living-room systems that need Bluetooth wireless streaming, high-resolution DAC conversion, tube warmth for HiFi listening. Tube-flavored integrated amp with DAC, Bluetooth, VU meter, and headphone out for bookshelf speakers.

Built for listeners who want measurable performance without a bulky AV receiver, the MC331 focuses on clean power, useful I/O, and strong value. Standout points include All-in-one DAC, amp, preamp, and headphone amp; Bluetooth, USB, optical, coax, and RCA inputs; Replaceable vacuum tubes and mini VU meter. Use this product page to compare specs and photos before you buy on Amazon.

Key Features

• All-in-one DAC, amp, preamp, and headphone amp
• Bluetooth, USB, optical, coax, and RCA inputs
• Replaceable vacuum tubes and mini VU meter
• Up to 105W x2 @4Ω for passive bookshelf speakers

Who It's For

Desktop and living-room HiFi chains that need high-resolution digital conversion, headphone drive, and/or balanced outputs into power amps like the ZA3 or V3 Mono. The MC331 is built for listeners who want cleaner decoding than onboard PC or TV audio.

Setup & Connectivity

On the desk or in a living-room rack, the MC331 is easy to integrate: expect RCA inputs for classic HiFi and desktop sources, Bluetooth streaming for phones, tablets, and laptops, digital inputs for PCs, TVs, and streamers, headphone outputs for IEMs and over-ear cans. Review the photos and feature list on this page, then buy through Amazon when you are ready — the same Fosi Audio hardware sold on the official store.

Why Choose the MC331

Choose the Fosi Audio MC331 when you want all-in-one dac, amp, preamp, and headphone amp for passive speakers and multi-amp HiFi builds. It sits in the same product family as Fosi’s popular TPA3255 amplifiers, balanced DAC preamps, and gaming DAC/AMPs — compact components that punch above their price on Amazon and the official Fosi Audio catalog.

Why Fosi Audio

Fosi Audio builds compact HiFi amplifiers, DACs, and desktop audio gear that punch above their price. From TPA3255 stereo and mono power amps to 2.1 and Bluetooth models, Fosi Audio focuses on clean Class-D power, useful connectivity, and value. Shop the same products featured on Amazon with specs and photos collected here for easy comparison.

Compare & explore

Browse more amplifiers, compare with Fosi Audio ZA3 and Fosi Audio V3, or explore DAC & amp models for source components.